FreeCalypso > hg > freecalypso-tools

annotate loadtools/simatr.c @ 921:74d284add54d

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fc-fsio: guard against bogus readdir results from the target If the FFS being operated on contains SE K2x0 extended filenames, readdir will return strings that are bad for printing. We need to guard against this possibility, and also against possible other bogosity that could be sent by other alien firmwares.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 31 Dec 2022 22:55:23 +0000
parents a31ae776de6e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
790
0bbe0213812d fc-simint put together, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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1 /*
0bbe0213812d fc-simint put together, compiles
Mychaela Falconia <falcon@freecalypso.org>
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2 * This module implements the stage in fc-simint where ATR bytes
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Mychaela Falconia <falcon@freecalypso.org>
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3 * received from simagent are validated.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9
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Mychaela Falconia <falcon@freecalypso.org>
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10 extern int sim_allow_spenh;
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Mychaela Falconia <falcon@freecalypso.org>
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11
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Mychaela Falconia <falcon@freecalypso.org>
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12 extern u_char sim_atr[];
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Mychaela Falconia <falcon@freecalypso.org>
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13 extern unsigned sim_atr_len;
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14
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Mychaela Falconia <falcon@freecalypso.org>
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15 void
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Mychaela Falconia <falcon@freecalypso.org>
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16 sim_atr_validate()
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17 {
0bbe0213812d fc-simint put together, compiles
Mychaela Falconia <falcon@freecalypso.org>
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18 unsigned b, p, y, nhist, have_tck;
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19
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20 if (sim_atr_len < 2) {
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Mychaela Falconia <falcon@freecalypso.org>
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21 too_short: fprintf(stderr, "error: ATR from simagent is too short\n");
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Mychaela Falconia <falcon@freecalypso.org>
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22 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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23 }
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Mychaela Falconia <falcon@freecalypso.org>
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24 b = sim_atr[1];
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Mychaela Falconia <falcon@freecalypso.org>
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25 p = 2;
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Mychaela Falconia <falcon@freecalypso.org>
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26 nhist = b & 0xF;
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Mychaela Falconia <falcon@freecalypso.org>
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27 y = b & 0xF0;
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28 have_tck = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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29 while (y) {
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Mychaela Falconia <falcon@freecalypso.org>
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30 if (y & 0x10) {
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Mychaela Falconia <falcon@freecalypso.org>
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31 if (p >= sim_atr_len)
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Mychaela Falconia <falcon@freecalypso.org>
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32 goto too_short;
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Mychaela Falconia <falcon@freecalypso.org>
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33 p++;
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Mychaela Falconia <falcon@freecalypso.org>
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34 }
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Mychaela Falconia <falcon@freecalypso.org>
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35 if (y & 0x20) {
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Mychaela Falconia <falcon@freecalypso.org>
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36 if (p >= sim_atr_len)
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Mychaela Falconia <falcon@freecalypso.org>
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37 goto too_short;
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Mychaela Falconia <falcon@freecalypso.org>
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38 p++;
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Mychaela Falconia <falcon@freecalypso.org>
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39 }
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Mychaela Falconia <falcon@freecalypso.org>
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40 if (y & 0x40) {
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Mychaela Falconia <falcon@freecalypso.org>
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41 if (p >= sim_atr_len)
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Mychaela Falconia <falcon@freecalypso.org>
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42 goto too_short;
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43 p++;
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Mychaela Falconia <falcon@freecalypso.org>
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44 }
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Mychaela Falconia <falcon@freecalypso.org>
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45 if (y & 0x80) {
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Mychaela Falconia <falcon@freecalypso.org>
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46 if (p >= sim_atr_len)
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Mychaela Falconia <falcon@freecalypso.org>
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47 goto too_short;
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Mychaela Falconia <falcon@freecalypso.org>
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48 b = sim_atr[p++];
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Mychaela Falconia <falcon@freecalypso.org>
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49 y = b & 0xF0;
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Mychaela Falconia <falcon@freecalypso.org>
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50 if (b & 0x0F)
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Mychaela Falconia <falcon@freecalypso.org>
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51 have_tck = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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52 } else
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Mychaela Falconia <falcon@freecalypso.org>
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53 y = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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54 }
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Mychaela Falconia <falcon@freecalypso.org>
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55 p += nhist + have_tck;
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Mychaela Falconia <falcon@freecalypso.org>
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56 if (p > sim_atr_len)
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Mychaela Falconia <falcon@freecalypso.org>
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57 goto too_short;
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Mychaela Falconia <falcon@freecalypso.org>
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58 if (p < sim_atr_len) {
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Mychaela Falconia <falcon@freecalypso.org>
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59 fprintf(stderr, "error: ATR from simagent is too long\n");
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60 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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61 }
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Mychaela Falconia <falcon@freecalypso.org>
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62 if (!have_tck)
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Mychaela Falconia <falcon@freecalypso.org>
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63 return;
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Mychaela Falconia <falcon@freecalypso.org>
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64 /* validate TCK */
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Mychaela Falconia <falcon@freecalypso.org>
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65 b = 0;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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66 for (p = 1; p < sim_atr_len; p++)
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Mychaela Falconia <falcon@freecalypso.org>
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67 b ^= sim_atr[p];
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Mychaela Falconia <falcon@freecalypso.org>
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68 if (b) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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69 fprintf(stderr, "error: ATR checksum is bad\n");
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Mychaela Falconia <falcon@freecalypso.org>
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70 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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71 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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72 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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73
0bbe0213812d fc-simint put together, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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74 void
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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75 sim_spenh_logic()
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Mychaela Falconia <falcon@freecalypso.org>
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76 {
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Mychaela Falconia <falcon@freecalypso.org>
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77 static char *targv[2] = {"spenh", 0};
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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78
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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79 if (sim_atr_len < 3 || !(sim_atr[1] & 0x10) || (sim_atr[2] < 0x94)) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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80 printf("ATR indicates no support for speed enhancement\n");
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Mychaela Falconia <falcon@freecalypso.org>
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81 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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82 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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83 if (!sim_allow_spenh) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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84 printf("Speed enhancement disabled with -n option\n");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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85 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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86 }
791
a31ae776de6e fc-simint: tell the user when we are requesting spenh
Mychaela Falconia <falcon@freecalypso.org>
parents: 790
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87 printf("Requesting SIM speed enhancement\n");
790
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Mychaela Falconia <falcon@freecalypso.org>
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88 tpinterf_make_cmd(targv);
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Mychaela Falconia <falcon@freecalypso.org>
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89 if (tpinterf_send_cmd() < 0)
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Mychaela Falconia <falcon@freecalypso.org>
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90 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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91 if (tpinterf_pass_output(10))
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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92 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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93 }